eàov MÉÕ¦ DcZÅKv (Bogra
Graben) ˆ`Gki cwøgvçjxq
A¯¦ixc ˆmvcvGb (western
foreland shelf) AewÕ©Z ‰es avivevwnKZvnxb (discontinuous)
MG´£vqvbv wmGÕ¡Ggi f„MfÆÕ© wkjv «¼viv MwVZ| cviwgqvb hyM (28 ˆKvwU 60
jÞ eQi ˆ^GK 24 ˆKvwU 50 jÞ eQi cƒGeÆ) ˆ^GK cÉexY wò×GUwmqvm hyM (cÉvq
14 ˆKvwU 40 jÞ eQi cƒGeÆ) chƯ¦ AvG™²q I cvjwjK wkjvi Õ¦iò×g ‰LvGb cvIqv
hvq| cÉexY MG´£vqvbv WvgyWÅv wmwiGRi wkjvI eàov MÉÕ¦ DcZÅKvq AvGQ| ivRgnj
ˆÕ¡GRi wkjvmgƒn WvgyWÅv wmwiGRi Dci AmsMZfvGe AwakvwqZ nGq AvGQ ‰es
‰B wkjvmgƒGni cyi‚Z½ ÞGqi KviGY KGg ˆMGQ| wkeMé Õ¦imgwÓ¡i cyi‚Z½ eàov
MÉÕ¦ DcZÅKvi wmsov-1x K„Gc 120 wgUvi ‰es KzPgv-x1
K„Gc 90 wgUvi KGg ˆMGQ| eàov MÉÕ¦ DcZÅKvi RvgvjMGé f„MfÆÕ© Zziv Õ¦imgwÓ¡i
m®¬vb cvIqv ˆMGQ| wmsov-1x,
KzPgv-x1
I eàov-x1
K„cmgƒGn f„MÆfÕ© Zziv Õ¦imgwÓ¡i cyi‚Z½ h^vò×Gg 360, 270 I 169 wgUvi|
eàov MÉÕ¦ DcZÅKvi mxgvbv PzÅwZ (boundary
fault) AçGji KvGQ eàov-x1 K„Gc AYyRxevkÄweævb (micropaleontology)
MGelYvq ˆKvb IwjGMvwmb DchyGMi wkjvi m®¬vb cvIqv hvq wb, ZGe wbKUeZÆx
KzPgv-x1
K„Gc civM Õ¦iwe`Åv (palynostratigraphy)
MGelYvq IwjGMvwmb wkjvi m®¬vb cvIqv ˆMGQ| evsjvG`Gk cwøgvçjxq A¯¦ixc
ˆmvcvGbi gaÅ gvGqvwmb DchyGMi AeGÞGci ‰KwU Ask eàov MÉÕ¦ DcZÅKvi KzPgv-x1, eàov-x1
‰es wmsov-1x
K„cmgƒGn cvIqv ˆMGQ|
eàov
MÉÕ¦ DcZÅKv AvovAvwofvGe (cross section) AcÉwZmg (assymetric)
‰es ‰i Dîi-cwøg ˆKvYvq Lvov `wÞYcƒeÆvwfgyLx bwZgvòvi (dip) cÉavb mxgvbv PzÅwZ AewÕ©Z,
ZGe `wÞY cƒeÆvçGji PzÅwZ ev PzÅwZ Açj nGjv LvwbKUv euvKvGbv (flexure)|
dGj f„-MVbwU `wÞYcwøg-DîicƒeÆ cÉeY ‰KwU AaÆMÉÕ¦ DcZÅKv, hvi gGaÅ cÉvq
1,300 wgUvi cyi‚ cÉexY I bexb MG´£vqvbv AeGÞc mwçZ iGqGQ| chÆvqò×wgK
(alternate)
ˆeGjcv^i, Aãvigq K`Ægwkjv I Kqjvi AvewZÆZ (cyclic) AeGÞc PzÅwZi gvòv ‰es f„AebgGbi
gvòv wbG`Æk KGi| eàov MÉÕ¦ DcZÅvKv nGjv eàov PzÅwZi wbÁ²NvZ (down thrust)
Ask| ‰B AskwUGZ DœPNvZ Ask AGcÞv wmGjU Pzbvcv^Gii cyi‚Z½ ˆewk| ‰wU PzÅwZ
eivei Lvov wePjb ‰es wmGjU Pzbvcv^i mçqGbi mgq eàov MÉÕ¦ DcZÅKv eivei
f„Aebgb wbG`Æk KGi| eãxq AeevwnKvq cÉexYZg AeGÞc nGjv f„MfÆÕ© Kqjv wgwkÉZ
cÉexY MG´£vqvbv Õ¦iò×g| ‰B Õ¦iò×g cwøgvçjxq A¯¦ixc ˆmvcvGbi AaÆMÉvGeb
f„-MVGb cvIqv hvq, hvi gGaÅ cGo eàov MÉÕ¦ DcZÅKv ‰es RvgvjMé Açj| eàov
MÉÕ¦ DcZÅKv I RvgvjMé AçGji f„MGfÆ AGbK Kqjv Õ¦i gRyZ iGqGQ|
[wmdvZzj
KvG`i ˆPŒayix]
